Searching for Authentic Mexican Food in Portland: La Carreta

La Carreta, 4534 SE McLoughlin Blv (99 and Holgate), Portland, OR.
We tried this restaurant a few days ago and it's pretty good--except for the food. Even with the bonus point (great Mariachi band on a Thursday night) they score a 6.5. There is no perfect ten without a hot sopapilla with butter and honey. We're wondering where the Mexicans hang out.
( on a ten point scale, we rate it 6.5, that's three stars )

Arizona Girls Authentic Mexican Food Rating System

Feel free to borrow our system! We finally have it down.
(Give up to one point for each of ten categories)
1) free hot crisp chips (0)
2) two or more salsa choices, one of which should be spicy HOT (0)
3) margarita with tequila and lime in it, no high fructose corn syrup (0)
4) food and plate temperature sizzling hot (0)
5) menu: simple, fresh, authentic, not "creative" (0)
6) good sauces/beans/tortillas (0)
7) good entrees (0)
8) reasonable price (0)
9) pleasant space, warmth, colors, lighting, smells, service, etc. (0)
10) "Sopapilla o' tortilla?" (0)
BONUS: (0)